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<head>
    <meta charset="UTF-8">
    <title>天地下载环保专区</title>
    <style type="text/css">
       body{
           background-image: url("bg.jpg");  /*图片*/
           background-repeat: no-repeat;     /*不重复*/
           background-attachment: fixed;   /*固定图片*/
           background-size: cover;
       }
    </style>
</head>
<body>


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